209861-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 209861-57-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,8,6 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 209861-57:
(8*2)+(7*0)+(6*9)+(5*8)+(4*6)+(3*1)+(2*5)+(1*7)=154
154 % 10 = 4
So 209861-57-4 is a valid CAS Registry Number.